论文标题
天体物理对超子耦合和具有相对论状态方程的超子耦合和超子恒星特性的含义
Astrophysical implications on hyperon couplings and hyperon star properties with relativistic equations of states
论文作者
论文摘要
超子是中子恒星内部中必不可少的成分。鲜为人知的超声波相互作用是研究实验室超核和中子星观测的不确定性来源。在这项工作中，我们使用Ligo/Virgo检测到的GW170817二进制中性明星合并的潮汐可观性测量以及Mass-Radius的测量值和PSR J0030+0541+0541和PSR J0740+6620的PSR J0030+0541+6620。该分析基于一组僵硬的相对论中子巨星方程，该状态具有相对论均值场理论的超子，自然地满足了因果关系的要求和经验核物质。我们特别利用了标量和媒介中膜超声耦合之间最近推论的强相关性，该耦合由单$ $λ$ hypernuclei中测得的$λ$分离能施加，并在有或没有强相关性的情况下执行四个不同的测试。我们发现，实验室超核约束可确保足够大的$λ$ -Scalar-Meson耦合，以匹配Hyperon Star Matter中的大型矢量耦合。 When adopting the current most probable intervals of hyperon couplings from the joint analysis of laboratory and astrophysical data, we find the maximum mass of hyperon stars is at most $2.176^{+0.085}_{-0.202}M_{\odot}$ ($68\%$ credible interval) from the chosen set of stiff equation of states.根据我们的分析，对由于超子引起的恒星半径的还原降低，并提供了各种超子恒星特性。
Hyperons are essential constituents in the neutron star interior. The poorly-known hyperonic interaction is a source of uncertainty for studying laboratory hypernuclei and neutron star observations. In this work, we perform Bayesian inference of phenomenological hyperon-nucleon interactions using the tidal-deformability measurement of the GW170817 binary neutron star merger as detected by LIGO/Virgo and the mass-radius measurements of PSR J0030+0541 and PSR J0740+6620 as detected by NICER. The analysis is based on a set of stiff relativistic neutron-star-matter equation of states with hyperons from the relativistic mean-field theory, naturally fulfilling the causality requirement and empirical nuclear matter properties. We specifically utilize the strong correlation recently deduced between the scalar and vector meson hyperon couplings, imposed by the measured $Λ$ separation energy in single-$Λ$ hypernuclei, and perform four different tests with or without the strong correlation. We find that the laboratory hypernuclear constraint ensures a large enough $Λ$-scalar-meson coupling to match the large vector coupling in hyperon star matter. When adopting the current most probable intervals of hyperon couplings from the joint analysis of laboratory and astrophysical data, we find the maximum mass of hyperon stars is at most $2.176^{+0.085}_{-0.202}M_{\odot}$ ($68\%$ credible interval) from the chosen set of stiff equation of states. The reduction of the stellar radius due to hyperons is quantified based on our analysis and various hyperon star properties are provided.
